body, html {
  height: 100%;
  width: 100%;
  margin: 0;
  font-family: Arial, sans-serif;
  font-size: 16px;
}
.container {
  width: 100%;
  height: 100%;
  background-image: url(./back.png);
  background-size: cover;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
input {
  width: 200px;
  height: 40px;
}
button {
  width: 200px;
  height: 40px;
  margin-top: 20px;
}